Improvement in ventilating millstones



C.- CERISIER.

Ventilating M'illstones.

' Wwesses *www datati gieten @anni @titre CONSTANT CERISIER, 0FMUNGSUR--LCIRE, FRANCE.

Letters Patent No. 98,555, dated January 4, 1870.

IMPROVEMENT IN VENTILA'I'IN G- MILLSTONES.

The` Schedule referred to in these Letters Patent and making paxt Of thesame To all whom "it may concern:

represents a vertical central section of this invention.

This invention relates to the arrangement of an airvessel, whichcommunicates, on one side, with an airpumpror reservoir, containing airunder pressure, and on another sidewith a chamber, secured to andrevolving with the runner` ofa grinding-mill, and through which extendsthe pipe for the introduction of the grain between the twomillstones,said air-vessel being supported by a balance-lever, which can beadjusted by means of a set-screw, in such a manner, that by means of theair-vessel, the pressure of the current of air, passing down to themillstones, is equalized, and,

. by means ofthe balance-lever, the position ofthe airpi pe in relationto the chamber attached to the runner, can be readily so adj usted thatit does not Ainterfere with the motion of said ruimer; and furthermore,by raising and lowering the air-pipe, the effect of the blast can beregulated.

In the drawingy The letter A designates the runner, and B, the bedstorieof a grinding-mill, said runner being connected to the spindle C`byncans manner.

'lo the top of the runner is secured the chamber E, through the top ofwhich extends a pipe, F, which connects with the air-vessel Gr, and thisair-vessel communicates, by a pipe, H, with a reservoir containofdrivers D, in the usual ing air under pressure.

A suit-able damper or valve, I, serves to regulate the supply of air.`

The joint between the pipe F and the top ofthe airchamber is renderedair-tight by means of a packingring, a, which, however, does notinterfere With the revolving motion of said chamber and the pipe Fis fsteadied and adjusted inits position by means of a balance-lever, J,which has its fnlcrum at or near one of its ends, in a post,lK, risingfrom the curb L, while its opposite end is guided in a slotted standard,M, and made adjust-able'by a set-screw, N, as shown in the drawing. l

The post K is provided with two or more holes, so

that the fnlcrum ot' the balance lever J can be raised or lowered, andthereby, and by adjusting the set screw N, the distance to which thepipe F projects into the chamber E, can be changed, and the effect of'`the blast on the grain can be regulated.

The grain is introduced to the millstones through a pipe, O, whichextends through the centre of the airvessel G and pipe F, and, onleaving sai-d pipe, the grain drops upon a cup, P, whereby it is evenlydistributed.

By the action of the air-vessel G, the force of the blast is rendereduniform, and, as the current of air passes down through the pipe F,through the grain in the chamber E, and out between thegrinding-surfaces ofthe stones, it serves to cool saidgrinding-surfaces, and it prevents the grain, while being ground, frombecoming heated. d

The pressure of theair in the air-vessel G must be kept up to such adegree that the current of air discharging from the pipe F is capable ofovercoming the current created by the centrifugal force of the runner.

What I claim as new, and desire to secure by Letters Patent, is-

l. The spherical air-vessel G, in combination with the air-supplyingpipe H and conducting-pipe F, for admitting air, equalizing itspressure, and conducting it under such equalized pressure to themillstones, as herein set forth.

2. The balance-lever J, pivoted, at one end, to the post K, andcarrying, at the other end, the single setscrew N, in combination wi-ththe pipe F, air-vessel C, and pipe H, substantially as and for thepurpose described.

CONSTANT CERISIER.

i Witnesses:

E. RENAUD, J. U. Znsr.

